library: libRooFit
#include "RooHistError.h"

RooHistError

class description - header file - source file
viewCVS header - viewCVS source

class RooHistError

Inheritance Inherited Members Includes Libraries
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Function Members (Methods)

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public:
RooHistError(const RooHistError&)
virtual~RooHistError()
static TClass*Class()
static RooAbsFunc*createBinomialSum(Int_t n, Int_t m)
static RooAbsFunc*createPoissonSum(Int_t n)
Bool_tgetBinomialInterval(Int_t n, Int_t m, Double_t& a1, Double_t& a2, Double_t nSigma = 1) const
Bool_tgetInterval(const RooAbsFunc* Qu, const RooAbsFunc* Ql, Double_t pointEstimate, Double_t stepSize, Double_t& lo, Double_t& hi, Double_t nSigma) const
Bool_tgetPoissonInterval(Int_t n, Double_t& mu1, Double_t& mu2, Double_t nSigma = 1) const
static const RooHistError&instance()
virtual TClass*IsA() const
RooHistError&operator=(const RooHistError&)
virtual voidShowMembers(TMemberInspector& insp, char* parent)
virtual voidStreamer(TBuffer& b)
voidStreamerNVirtual(TBuffer& b)
private:
RooHistError()
Bool_tgetPoissonIntervalCalc(Int_t n, Double_t& mu1, Double_t& mu2, Double_t nSigma = 1) const
Double_tseek(const RooAbsFunc& f, Double_t startAt, Double_t step, Double_t value) const

Data Members

private:
Double_t_poissonLoLUT[1000]
Double_t_poissonHiLUT[1000]

Class Description

const RooHistError & instance()
 Return a reference to a singleton object that is created the
 first time this method is called. Only one object will be
 constructed per ROOT session.
RooHistError()
 Construct our singleton object.
Bool_t getPoissonInterval(Int_t n, Double_t &mu1, Double_t &mu2, Double_t nSigma)
 Use lookup table for most common cases
Bool_t getPoissonIntervalCalc(Int_t n, Double_t &mu1, Double_t &mu2, Double_t nSigma)
 Calculate a confidence interval for the expected number of events given n
 observed (unweighted) events. The interval will contain the same probability
 as nSigma of a Gaussian. Uses a central interval unless this does not enclose
 the point estimate n (ie, for small n) in which case the interval is adjusted
 to start at n.
Bool_t getBinomialInterval(Int_t n, Int_t m, Double_t &asym1, Double_t &asym2, Double_t nSigma)
 sanity checks
Bool_t getInterval(const RooAbsFunc *Qu, const RooAbsFunc *Ql, Double_t pointEstimate, Double_t stepSize, Double_t &lo, Double_t &hi, Double_t nSigma)
 Calculate a confidence interval using the cummulative functions provided.
 The interval will be "central" when both cummulative functions are provided,
 unless this would exclude the pointEstimate, in which case a one-sided interval
 pinned at the point estimate is returned instead.
Double_t seek(const RooAbsFunc &f, Double_t startAt, Double_t step, Double_t value)
 Scan f(x)-value until it changes sign. Start at the specified point and take constant
 steps of the specified size. Give up after 1000 steps.
virtual ~RooHistError()
{}
RooAbsFunc * createPoissonSum(Int_t n)
{ return new PoissonSum(n); }
RooAbsFunc * createBinomialSum(Int_t n, Int_t m)
{ return new BinomialSum(n,m); }
RooHistError()

Last update: Sat Dec 9 09:58:29 2006
Copyright (c) 2000-2005, Regents of the University of California *

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